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Default textures for diffuse/specular/normal/emission mat slots

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bloeys
2024-05-11 05:11:54 +04:00
parent c884d2624d
commit 7b1e3ea7b4
7 changed files with 112 additions and 55 deletions
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56
engine/engine.go
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@ -1,10 +1,13 @@
package engine
import (
"image"
"image/color"
"runtime"
imgui "github.com/AllenDang/cimgui-go"
"github.com/bloeys/nmage/assert"
"github.com/bloeys/nmage/assets"
"github.com/bloeys/nmage/input"
"github.com/bloeys/nmage/renderer"
"github.com/bloeys/nmage/timing"
@ -202,6 +205,8 @@ func createWindow(title string, x, y, width, height int32, flags WindowFlags, re
return win, err
}
setupDefaultTextures()
// Get rid of the blinding white startup screen (unfortunately there is still one frame of white)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT)
win.SDLWin.GLSwap()
@ -231,6 +236,57 @@ func initOpenGL() error {
return nil
}
func setupDefaultTextures() error {
// 1x1 black texture
defaultBlackImg := image.NewNRGBA(image.Rect(0, 0, 1, 1))
defaultBlackImg.Set(0, 0, color.NRGBA{R: 0, G: 0, B: 0, A: 1})
defaultBlackImgTex, err := assets.LoadTextureInMemPngImg(defaultBlackImg, &assets.TextureLoadOptions{NoSrgba: true})
if err != nil {
return err
}
assets.DefaultBlackTexId = defaultBlackImgTex
// 1x1 white texture
defaultWhiteImg := image.NewNRGBA(image.Rect(0, 0, 1, 1))
defaultWhiteImg.Set(0, 0, color.NRGBA{R: 255, G: 255, B: 255, A: 1})
defaultWhiteImgTex, err := assets.LoadTextureInMemPngImg(defaultWhiteImg, &assets.TextureLoadOptions{NoSrgba: true})
if err != nil {
return err
}
assets.DefaultWhiteTexId = defaultWhiteImgTex
// Default diffuse
assets.DefaultDiffuseTexId = defaultWhiteImgTex
// Default specular
assets.DefaultSpecularTexId = defaultBlackImgTex
// Default Normal map which is created to be RGB(0.5,0.5,1), which when multiplied by TBN matrix gives the vertex normal.
// 128 is better than 127 for normal maps. See 'Flat Color' section here: http://wiki.polycount.com/wiki/Normal_map
// Basically, 127 can create seams while 128 looks correct
defaultNormalMapImg := image.NewNRGBA(image.Rect(0, 0, 1, 1))
defaultNormalMapImg.Set(0, 0, color.NRGBA{R: 128, G: 128, B: 255, A: 1})
defaultNormalMapTex, err := assets.LoadTextureInMemPngImg(defaultNormalMapImg, &assets.TextureLoadOptions{NoSrgba: true})
if err != nil {
return err
}
assets.DefaultNormalTexId = defaultNormalMapTex
// Default emission
assets.DefaultEmissionTexId = defaultBlackImgTex
assert.T(assets.DefaultBlackTexId.TexID != 0, "The default black texture handle is zero. Either texture wasn't created or handle wasn't updated")
assert.T(assets.DefaultWhiteTexId.TexID != 0, "The default white texture handle is zero. Either texture wasn't created or handle wasn't updated")
assert.T(assets.DefaultDiffuseTexId.TexID != 0, "The default diffuse texture handle is zero. Either texture wasn't created or handle wasn't updated")
assert.T(assets.DefaultSpecularTexId.TexID != 0, "The default specular texture handle is zero. Either texture wasn't created or handle wasn't updated")
assert.T(assets.DefaultNormalTexId.TexID != 0, "The default normal texture handle is zero. Either texture wasn't created or handle wasn't updated")
assert.T(assets.DefaultEmissionTexId.TexID != 0, "The default emission texture handle is zero. Either texture wasn't created or handle wasn't updated")
return nil
}
func SetSrgbFramebuffer(isEnabled bool) {
if isEnabled {